Humans and the Environment
Mindmap showing threats to the environment, caused by humans
- Created by: emily_w
- Created on: 26-04-14 12:30
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- Humans and the Environment
- Overfishing
- More fish caught than can be replaced through natural reproduction
- marine biologists protest against--protect endangered species.
- people who rely on fish for income affected
- French/Spanish/ British fighting over fishing grounds
- Somali pirates protect waters after government collapse
- Only a problem in last 60 years, when people started fishing with big nets
- Fish waste: limits on how many can be caught, but dead ones get thrown back
- affect ecosystems and risk extinctions
- Peat bogs
- Destruction of bogs contributes to global warming: bogs store CO2
- Peat=undecayed plant tissue, environment too acidic to decay normally
- Destroyed for fuel/compost, drained for agriculture
- 45% peat bogs in britain destroyed
- also give off methane--marsh gas
- Deforestation
- 3 million hectares per year cut down in Amazon/ 8 football fields a day
- timber used for fuel, paper, furniture ect
- Destroy animal habitats, and harm Amazon natives
- companies like Andrex replant trees
- forests convert CO2 to O, also stores of CO2
- Acid rain
- fossil fuels burn, sulphates and nitrates dissolved into rain water
- kills trees and can destroy whole ecosystems
- forests in Eastern/Central Europe, eg Czech republic, especially affected
- plants/ animals cannot live in lakes which have become too acidic. concerns over human health
- restrictions on factory sulphur emissions
- Overfishing
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